Paper slitter



Patented May 18, 1926.

UNITED STATES PATENT OFFICE.

HERMAN L. KUTTER, 0F HAMILTON, OHIO, ASSIG-NOR TO THE BLACK-CLAWSON COM-IPANY, OF HAMILTON, OHIO, A CORIPORATIONT OF OHIO.

PAPER SLITTER.

Application filed October 13, 1923. Serial No. 668,350.

This invention relates to apparatus for cutting paper, and moreparticularly to ap paratus of that character which is known in the artas a paper slitter.

Devices of this general character are widely used in the paper makingart; and they consist generally of two opposed rotary knives, orslitters, between which the paper is passed to be cut.

One of the principal objects of the invention is to provide apparatus ofthis character which is simple in construction, which is easilyassembled and disassembled, which clamps the slitter mechanism tightlyupon the shaft by which it is carried, and which is so constructed thatthe device will be in balance during operation.

Other objects and advantages of the i11 vention will be apparent in thedescription thereof setout below, when taken in connectionwith'theaccompanying drawings.

In the drawings, in which like characters of. reference designate likeparts throughout the several views thereof,

Fig. 1 is a transverse sectional view through a slitter constructed inaccordance with this invention; and

Fig. 2 is a longitudinal sectional .view along the line 22 of Fig. 1.

The slitter which forms the subject matter of this invention, and ofwhich a preferred embodiment is shown in the-drawing, is constructed forcooperation with a revolving knife, which is not shown, this arrangementof slitter and lmi'fe being quite generally used.

The slitter is mounted upon a shaft 10, which is driven in any suitablemanner, and comprises a hub portion 11, which has a passage 12 therein,adapted to receive the shaft. This hub portion, as clearly shown,

in Fig. 1 is slit entirely across, as at'13,"the opposed ends resultingfrom this slitting of the hub being provided with cooperating taperedgrooves 14.

The hub is also provided with a pocket 0 ,tightly within the slitterband, to hold that recess 15, which opens through the periphery of thehub and is adapted to receive a tightening sleeve 20. This sleeve isprovided with a passage 21 which is adapted to receive theshaft' 10 andto be, when the device is assembled, in substantial alignment with thepassage 12 in the hub. As will be evident from Fig. 1 the tighteningsleeve 20 is so shaped that when in position it will substantially fillthe pocket 15, of the hub, so that during rotation of the device, uponthe shaft 10, the apparatus will be in'balance.

The hub isvalso provided with a passage 22, which extends from theperipheryof the hub. andopens into the bottom of'the pocket 15. Thispassage is of two diameters to provide a shoulder 23. The tighteningsleeve 20 is also provided with a passage 24, which is so positionedtherein that when the device is assembled the passages 22 and 24 are inregister with each other. Passage 24 is threaded, and is adapted toreceive the threaded end of the tightening screw 25, which is introducedthrough the passage22. This tightening screw intermediate its length isprovided with-a flange or shoulder 26- adapted to cooperate with theshoulder 23, and at its outer end is provided with a wrench receivingportion 27. By manipulating the tightening screw 25, the hub 11 and thetightening ring 20 will be moved in opposite directions to clamp each ofthese members tightly against the shaft, the con struction being suchthat the hub and tightening ring will clamp the shaft aboutsubstantially its entire circumference. The tightening screw 25,therefore, serves the double purpose of connecting the hub andtightening ring together and clamping the hub and tightening ring uponthe shaft.

The periphery of the hub 11 is constructed to receive a slitter band 30,the end of which is beveled to provide a knife edge as shown by thenumeral 31, which knife edge cooperates with the revolving knifereferred to above. This slitter band is made separate from the hub bothto facilitate manufacture and to permit of replacement or repair. Thisband is made of such internal diameter that it maybe. readily slid intoposition upon the hub. WVhen the band has been properly positioned atapered wedge pin 32 is driven into the tapered grooves 14 to spread theslit ends of the hub apart and thus clamp it tightening screw may beinserted in place and a suitable wrench may be inserted for propermanipulation of the tightening screw to effectadjustment of the device.

hile the form of ap )aratus illustrated herein constitutes 'a "pre erredembodiment of the invention, it is to be understood that the inventionis not limited to this precise form, and that changes may be madetherein without departing from the scope of the invention which isdefined in :the appended claims.

Whatis claimed is:

1. In a paper slitter of the character ,described, a hub having apassage therethrough adapted to receive a shaft to which the slitter isto be attached, and also having -apocket therein; a tightening ring,having a passage therethrough, :for positioning within thesaid pocket,the passage through said ring beingadapted :to register with the passagein the said hub to receive the shaft; and means for connecting the saidhub and tightening ring .to the said shaft.

'2. In a paper slitter of the character de scribed, the combination withashaft; of a hub member adapted for positioning :upon said shaft, saidhub member having a pocket therein and a passage throughsaid hub memheropening into the said pocket; a tightening ring positioned within thesaid pocket having a threaded passage therein constructed forregistering with the passage Within the said hub, and a tightening screwpositioned within these two said passages to urge the hub and ring inopposite directions to connect the hub and ring together and fasten themonto the shaft.

3. In a paper slitterof the character described, the combination with ashaft; of a slitted hub member mounted upon said shaft, having a pockettherein and a passaid sage through said .hub opening into pocket, ashoulder within said passage; a tightening ring within said pocket andsurrounding said shaft, said ring having a threaded passage thereinadapted to register with the passage in said hub; a shoulderedtightening screw mounted within the said two registering passages toconnect the hub and tightening ring together and :to urge them inopposite directions to fasten them on the shaft; a slitterbandsurrounding said hub, and a wedge member positioned within the slitin said hub to expand said hub and clamp the slitter bandin place.

passage .therethrough adapted to receive the shaft, and having a pockettherein opening through the periphery of the hub; a tighten- '-ing ringpositioned within the said pocket,

having a passa e therethrough for receiving the shaft, the shaftreceiving passages in the hub member and in the tightening ring beingsubstantially coextensive when the device is assembled upon the shaft;and means for urging the hub member and tightening ring in oppositedirections to fasten them on to-the shaft.

5. ,In a paper slitter of the character described, an expansible hubhaving a passage therethrough adapted to receive a shaft to which theslitter is to be attached; a slitter band surrounding said hub of suchdimensions that it will slip freely over the said hub when the hub isnot expanded; and means for expanding the said hub (to clamp the slittertightly in place thereon.

6. In a. paper slitter of the. character described, a slitted expansiblehub having a passage therethrough adapted to receive a shaft to whichthe slitter is to be attached, and means for fastening the said hub uponthe shaft, a slitter band surrounding the periphery of said hub saidband being of such dimensions as :to slip freely over the hub when thesaid hub is not expanded; and means cooperating with the slitted portionof said hub for expanding it to clamp the slitter band tightly thereon.

7. In a paper slitter of the character described, the combination with ashaft; of a hub member having a passage therein adapted to receive thesaid shaft, and a pocket therein opening through the periphery of saidhub member, and of greater extent than the sha-ft receiving passage: atightening ring within said pocket, said ring having a passage thereinfor receiving the shaft, the shaft receiving passages in the hub and inthe ring being substantially in alignment when the device is assembledupon the shaft; and means engaging the said hub and tightening ring forcausing movement vof the hub and tightening ring relative to the shaftto clamp both said members to the shaft.

In testimony whereof I hereto afiix my signature.

HERMAN 'L. KUTTER.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,584,868, granted May18, 1926, upon the application of Herman L. Kutter, of Hamilton, Ohio,for an improvement in Paper Slitters, an error appears in the printedspecification requiring correction as follows: Page 2, line 33, claim 2,strike out the Words having a threaded passage therein and insert thesame to follow after the Word ring in line 32 of the same claim; andthat the said Letters Patent should be read with this correction thereinthat the same may conform to therecord of the case in the Patent Oflice.

Signed andsealed this 22d day of June, A. D. 1926.

SEAL M. J. MOORE,

Acting Commissioner of Patents.

